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Reliability Engineering Intern - Silicon Photonics

Santa Clara, CA

About Celestial AI

As Generative AI continues to advance, the performance drivers for data center infrastructure are shifting from systems-on-chip (SOCs) to systems of chips. In the era of Accelerated Computing, data center bottlenecks are no longer limited to compute performance, but rather the system’s interconnect bandwidth, memory bandwidth, and memory capacity. Celestial AI’s Photonic Fabric™ is the next-generation interconnect technology that delivers a tenfold increase in performance and energy efficiency compared to competing solutions.

The Photonic Fabric™ is available to our customers in multiple technology offerings, including optical interface chiplets, optical interposers, and Optical Multi-chip Interconnect Bridges (OMIB). This allows customers to easily incorporate high bandwidth, low power, and low latency optical interfaces into their AI accelerators and GPUs. The technology is fully compatible with both protocol and physical layers, including standard 2.5D packaging processes. This seamless integration enables XPUs to utilize optical interconnects for both compute-to-compute and compute-to-memory fabrics, achieving bandwidths in the tens of terabits per second with nanosecond latencies.

This innovation empowers hyperscalers to enhance the efficiency and cost-effectiveness of AI processing by optimizing the XPUs required for training and inference, while significantly reducing the TCO2 impact. To bolster customer collaborations, Celestial AI is developing a Photonic Fabric ecosystem consisting of tier-1 partnerships that include custom silicon/ASIC design, system integrators, HBM memory, assembly, and packaging suppliers.

ABOUT THE ROLE

We are looking for a passionate and driven Reliability Engineering Intern to join our Silicon Photonics team for Summer 2026. In this role, you will support the development and execution of reliability testing strategies for next-generation photonic devices used in high-speed data communication and computing applications.

This is a unique opportunity to work at the intersection of semiconductor reliability and photonics innovation, contributing to the long-term performance and robustness of cutting-edge optical components.

ESSENTIAL DUTIES AND RESPONSIBILITIES

  • Assist in the design and execution of reliability test plans for silicon photonics components (e.g., modulators, photodetectors, waveguides, lasers).
  • Support environmental stress testing (e.g., HTOL, TC, HAST, damp heat) and optical performance monitoring over time.
  • Analyze degradation trends in optical and electrical parameters using statistical tools and scripting (e.g., Python, JMP).
  • Help develop or enhance data collection and analysis pipelines, including database integration and visualization dashboards.
  • Collaborate with cross-functional teams including design, test, packaging, and failure analysis to identify and resolve reliability risks.
  • Document test procedures, results, and findings in technical reports and presentations.

QUALIFICATIONS

  • Pursuing a Bachelor’s or Master’s degree or Doctorate in Electrical Engineering, Materials Science, Applied Physics, or a related field.
  • Coursework or project experience in photonics, semiconductor devices, or optical communications.
  • Familiarity with reliability testing methods and failure mechanisms in optoelectronic devices is a plus.
  • Proficiency in Python, MATLAB, or similar tools for data analysis and automation.
  • Experience with optical test equipment (e.g., optical spectrum analyzers, power meters, BER testers) is a strong plus.
  • Strong problem-solving, communication, and documentation skills.
  • Enthusiasm for learning and contributing in a fast-paced, collaborative R&D environment.

WHAT YOU'LL GAIN

  • Hands-on experience with real-world reliability challenges in silicon photonics.
  • Exposure to advanced testing methodologies and failure analysis techniques.
  • Mentorship from experienced engineers and opportunities to present your work.
  • A chance to contribute to the future of optical interconnects and high-speed data technologies.

LOCATION: Santa Clara, CA

 

This paid summer internship offers a competitive hourly rate of $40.00. Please note that as an intern, you will not be eligible for company-sponsored benefits, including paid time off, health insurance, life insurance, stock options, or retirement plans.

We offer great benefits (health, vision, dental and life insurance), collaborative and continuous learning work environment, where you will get a chance to work with smart and dedicated people engaged in developing the next generation architecture for high performance computing.

Celestial AI Inc. is proud to be an equal opportunity workplace and is an affirmative action employer.

 

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